Respuesta estratigráfica a la Transgresión Tortoniense en el Margen Pasivo de la Cuenca del Guadalquivirdatos preliminares

  1. José Gabriel Pendón Martín
  2. Manuel Abad de los Santos
  3. Joaquín Rodríguez Vidal
  4. Nieves López González
  5. Francisco Ruiz Muñoz
Journal:
Geogaceta

ISSN: 0213-683X

Year of publication: 2005

Issue: 38

Pages: 167-170

Type: Article

More publications in: Geogaceta

Abstract

The passive margin of the Guadalquivir foreland basin records different stages of evolution during the tortonian transgression, mainly determinate by sedimentary supply/ accommodation space ratio (A/S ratio, Cattaneo and Steel, 2003). In a first phase, a high supply from the continental and deltaic systems filled quickly the low accommodation space and produced an agradational/progradational stacking pattern of sequences. The second episode is characterized by a change in these conditions, so the passive margin register a high increase of depth and carbonate facies predominates. Finally, the transgressive maximum is registered by means of the formation of a condensed level constituted by glauconitic sands and silts. This transgressive pulse supposed the advance of the shoreline several kilometres towards the foreland.